Preheat oven to 350. Grease and flour a bundt or tube pan. (Butter works better than non-stick spray.)
Cream the butter and shortening together. Beat in the sugar.
Add the eggs, 1 at a time, beating after each addition.
In a separate bowl, whisk together the flour, salt and baking powder.
Alternate adding a little bit of your dry ingredients to the mixer with adding your milk, starting and ending with the flour mixture.
Stir in the vanilla.
Pour the batter into your prepared pan and bake for 1 hour at 350.
Let the cake cool in the pan on a rack for 15 minutes, then gently run a thin knife around the edges and invert the cake on to a serving platter.
Let cool completely then serve plain or with berries and whipped cream or other toppings if desired!